總和的聯合查詢 - 語法錯誤 - SQL服務器

Question

我試圖做聯合查詢和與我得到

Syntax error: incorrect syntax near ')'

代碼：

select 
    sum(rate) 
from 
    (select 
     sum(UnitsDelivered * Rate) as rate 
    from 
     Reimbursement_EBSUtilization 
    where 
     PRR_Id = 1 

    UNION ALL 

    select 
     sum(Reimbursement_CDSUtilization.Rate * CDSUtilization.UnitsDelivered) as rate 
    from 
     Reimbursement_CDSUtilization 
    left join 
     CDSUtilization on Reimbursement_CDSUtilization.CDSU_Id = CDSUtilization.Id 
    where 
     Reimbursement_CDSUtilization.PRR_Id = 270 
)--syntax error is showing here 

我確信我很失去了一些東西小而無法弄清楚

Answer 1

您需要別名子查詢：

select sum(rate) from 
(
    select sum(UnitsDelivered*Rate) as rate 
    from Reimbursement_EBSUtilization 
    where PRR_Id =1 

    UNION ALL 

    select sum(Reimbursement_CDSUtilization.Rate * CDSUtilization.UnitsDelivered) as rate 
    from Reimbursement_CDSUtilization 
    left join CDSUtilization on Reimbursement_CDSUtilization.CDSU_Id = CDSUtilization.Id 
    where Reimbursement_CDSUtilization.PRR_Id = 270 
) as t -- <-- use alias here